/*
 * ------------------------------------------------------------------
 *  Copyright by KNIME AG, Zurich, Switzerland
 *  Website: http://www.knime.com; Email: contact@knime.com
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License, Version 3, as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, see <http://www.gnu.org/licenses>.
 *
 *  Additional permission under GNU GPL version 3 section 7:
 *
 *  KNIME interoperates with ECLIPSE solely via ECLIPSE's plug-in APIs.
 *  Hence, KNIME and ECLIPSE are both independent programs and are not
 *  derived from each other. Should, however, the interpretation of the
 *  GNU GPL Version 3 ("License") under any applicable laws result in
 *  KNIME and ECLIPSE being a combined program, KNIME AG herewith grants
 *  you the additional permission to use and propagate KNIME together with
 *  ECLIPSE with only the license terms in place for ECLIPSE applying to
 *  ECLIPSE and the GNU GPL Version 3 applying for KNIME, provided the
 *  license terms of ECLIPSE themselves allow for the respective use and
 *  propagation of ECLIPSE together with KNIME.
 *
 *  Additional permission relating to nodes for KNIME that extend the Node
 *  Extension (and in particular that are based on subclasses of NodeModel,
 *  NodeDialog, and NodeView) and that only interoperate with KNIME through
 *  standard APIs ("Nodes"):
 *  Nodes are deemed to be separate and independent programs and to not be
 *  covered works.  Notwithstanding anything to the contrary in the
 *  License, the License does not apply to Nodes, you are not required to
 *  license Nodes under the License, and you are granted a license to
 *  prepare and propagate Nodes, in each case even if such Nodes are
 *  propagated with or for interoperation with KNIME.  The owner of a Node
 *  may freely choose the license terms applicable to such Node, including
 *  when such Node is propagated with or for interoperation with KNIME.
 * --------------------------------------------------------------------- *
 *
 * History
 *   May 18, 2006 (ritmeier): created
 */
package org.knime.testing.node.differNode;

import org.knime.core.data.DataTable;
import org.knime.core.data.RowIterator;

/**
 * Fails if one of the input tables is not empty.
 *
 * @author Tobias Koetter, University of Konstanz
 *
 * @deprecated use the table comparator {@link org.knime.testing.internal.nodes.differ.DifferenceCheckerNodeFactory} and
 *             the extension point for difference checker instead
 */
@Deprecated
public class EmptyTableChecker implements TestEvaluator {
    /**
     *
     * @throws TestEvaluationException
     * @see org.knime.testing.node.differNode.TestEvaluator#compare(
     *      org.knime.core.data.DataTable, org.knime.core.data.DataTable)
     */
    @Override
    public void compare(final DataTable table1, final DataTable table2)
            throws TestEvaluationException {
        int table1RowCount = 0;
        final RowIterator iter1 = table1.iterator();
        while (iter1.hasNext()) {
            table1RowCount++;
            iter1.next();
        }
        int table2RowCount = 0;
        final RowIterator iter2 = table2.iterator();
        while (iter2.hasNext()) {
            table2RowCount++;
            iter2.next();
        }
        String errorMsg = "";
        if (table1RowCount > 0) {
            errorMsg += "Table1 contains " + table1RowCount + " rows. ";
        }
        if (table2RowCount > 0) {
            errorMsg += "Table2 contains " + table2RowCount + " rows.";
        }
        if (!errorMsg.isEmpty()) {
            throw new TestEvaluationException(errorMsg);
        }
    }
}
